CN211857256U - Control circuit of slit scanner - Google Patents
Control circuit of slit scanner Download PDFInfo
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- CN211857256U CN211857256U CN202020949052.4U CN202020949052U CN211857256U CN 211857256 U CN211857256 U CN 211857256U CN 202020949052 U CN202020949052 U CN 202020949052U CN 211857256 U CN211857256 U CN 211857256U
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Abstract
A control circuit of a slit scanner comprises a system board, wherein a power management module, a controller module, an ADC (analog-to-digital converter) module, an incremental encoder and an interface module are arranged on the system board; the power management module is connected with other modules and provides proper power supply voltage for the modules; the controller module is connected with each module and the upper computer and is used for receiving or sending commands between each module and the upper computer and coordinating the work of each module; the ADC module is used for converting the analog signal into an electric signal; the incremental encoder is used for being matched with the photoelectric coded disc to realize the photoelectric coding function; the interface module can be used for connecting the system board and external equipment, and is used for expanding the functions of the control circuit.
Description
Technical Field
The utility model relates to an analysis and detection equipment technical field, especially a slit scanner's control circuit.
Background
The slit scanning control circuit is an important component of the slit scanner and is used for receiving commands sent by an upper computer, controlling the operation of a slit scanning mechanism, feeding back obtained data information to the upper computer and the like, so that the performance of the slit scanner is obviously good or bad, not only is related to the quality of each component, but also is more important whether the functional design of the control circuit is reasonable or not, whether the working state of each component can be effectively coordinated or not, and the optimal performance of each component is exerted. The existing slit scanning control circuit has low integration level and poor reliability, and has defects in the aspects of ADC conditioning circuit design, conversion of various DC power supply voltages, electromagnetic compatibility processing among functional modules and the like.
Disclosure of Invention
The utility model aims at: the control circuit of the slit scanner overcomes the defects of the prior art, and has the advantages of reasonable design, compact structure, good electromagnetic compatibility and the like.
The technical scheme of the utility model is that: a control circuit of a slit scanner comprises a system board, wherein a power management module, a controller module, an ADC (analog-to-digital converter) module, an incremental encoder and an interface module are arranged on the system board; the power management module is connected with other modules and provides proper power supply voltage for the modules; the controller module is connected with each module and the upper computer and is used for receiving or sending commands between each module and the upper computer and coordinating the work of each module; the ADC module is used for converting the analog signal into an electric signal; the incremental encoder is used for being matched with the photoelectric coded disc to realize the photoelectric coding function; the interface module can be used for connecting the system board and external equipment, and is used for expanding the functions of the control circuit.
Further, the controller module comprises a microcontroller (i.e. MCU) and an expansion memory; the microcontroller uses STM32F407VGT6, the STM32F407VGT6 controller has 32-bit data bus width, the maximum clock frequency is 168MHz, the program memory has 1024KB, the data RAM has 192KB, the working voltage is 3.3V, the whole uses LQFP-100 encapsulation and other characteristics, and the requirements of slit scanner system service application function are well met; the expansion memory can adopt IS62WV51216EBLL-45TLI, the storage capacity of the expansion memory IS 8Mbit, and the power supply voltage range IS 2.2-3.6V.
Further, the ADC analog-to-digital conversion module adopts AD7622 BSTZ; AD7622 BSTZ is a 16-bit resolution SAR-type ADC device with 1.5MSPS throughput, ± 2.5V differential input, parallel (16-bit or 8-bit bus) and serial 5V/3.3V/2.5V interfaces; the ADC analog-to-digital conversion module can adopt a 2.5V single power supply for power supply; the MCU is communicated with the MCU through a serial SPI interface; an AD7622 input front end adopts an AD8139 to carry out single-end or differential-to-differential input ADC driving circuit; the ADC analog-to-digital conversion module also comprises a signal conditioning circuit which is designed according to factors such as the size of an input signal, the range of full-scale input of the ADC, the polarity of the signal, the polarity of the input of the ADC and the signal whether the signal is input in a single end or in a differential mode.
Further, the power management module comprises a level conversion chip, the level conversion chip adopts SN74LV1T126, SN74LV1T126 is a low-voltage CMOS gate logic with a wide voltage range, the output level of the circuit is based on the power voltage, and the circuit can support 1.8V/2.5V/3.3V/5V CMOS level and can be used for level matching between an incremental encoder IO (5V) and an MCU IO (3.3V).
Further, the power management module comprises a voltage stabilizer, the voltage stabilizer adopts a 500mA low dropout linear voltage stabilizer LT3085, and can realize stable voltage output of 3.3V and 2.5V, wherein the 3.3V voltage can be used for supplying power to a Microcontroller (MCU), a memory and an ADC analog-to-digital conversion module, and the 2.5V voltage can also be used for supplying power to the ADC analog-to-digital conversion module.
Further, the power management module converts an externally input 5V voltage into 12V for supplying power to a motor driving board connected to the system board.
Further, the interface module comprises a DC interface, an ADC interface, a USB interface, an SPI interface, an SWD interface and a motor drive board interface, the DC interface is used for connecting an external power supply, the USB interface is used for communicating with an upper computer, receiving commands of the upper computer and feeding back data to the upper computer, and the motor drive board interface is used for connecting a motor drive board.
Further, a software module is integrated on the system board, and the software module comprises a software module for receiving and sending data based on a USB bottom layer drive of an STM32F406VGT6 controller, a software module for acquiring optical power at a high speed in real time, a data transmission software module based on DMA, a software module for measuring pulse width and duty ratio of a photoelectric encoder, a slit scanning rotating speed control software module, an upper computer demonstration software module and the like.
Further, the system board can be made to have a shape suitable for the internal structure of the scanner, which is advantageous for saving the installation space sufficiently.
Compared with the prior art, the utility model has the following characteristics: the utility model discloses a control circuit can realize analog-to-digital conversion and data acquisition and storage to the integration has the increment encoder to carry out accurate control to motor speed, still through power management module, supplies power to microcontroller, expansion memory, increment encoder and ADC analog-to-digital conversion module respectively, can realize multiple DC mains voltage's transform moreover.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of embodiment 1 of the present invention;
in the figure: the system comprises a system board 1, a power management module 2, a controller module 3, an ADC module 4, an incremental encoder 5 and an interface module 6.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
Example 1
As shown in the figure, the present embodiment is a control circuit of a slit scanner, including a system board 1, where the system board 1 is adapted to the external dimensions of a target product, and the system board 1 is provided with a power management module 2, a controller module 3, an ADC analog-to-digital conversion module 4, an incremental encoder 5, and an interface module 6; the power management module 2 is connected with other modules and provides proper power supply voltage for the modules; the controller module 3 is connected with each module and the upper computer and is used for receiving or sending commands between each module and the upper computer and coordinating the work of each module; the ADC analog-to-digital conversion module 4 is used for converting the analog signal into an electric signal; the incremental encoder 5 is used for being matched with the photoelectric coded disc to realize the photoelectric coding function; the interface module 6 can be used for communication connection between the system board 1 and an external device to expand the functions of the control circuit.
The controller module 3 of the present embodiment includes a microcontroller (i.e., MCU) and an expansion memory; the microcontroller uses STM32F407VGT6, the STM32F407VGT6 controller has 32-bit data bus width, the maximum clock frequency is 168MHz, the program memory has 1024KB, the data RAM has 192KB, the working voltage is 3.3V, the whole is packaged by LQFP-100, and the requirements of the slit scanner system service application function are very met; the expansion memory adopts IS62WV51216EBLL-45TLI, the storage capacity IS 8Mbit, and the power supply voltage range IS 2.2-3.6V.
The ADC analog-to-digital conversion module 4 of this embodiment employs AD7622 BSTZ; the ADC analog-to-digital conversion module 4 adopts a 2.5V single power supply for power supply; the MCU is communicated with the MCU through a serial SPI interface; an AD7622 input front end adopts an AD8139 to carry out single-end or differential-to-differential input ADC driving circuit; the ADC analog-to-digital conversion module 4 further includes a signal conditioning circuit designed according to the size of the input signal, the range of the ADC full-scale input, the polarity of the signal, the polarity of the ADC input, and whether the signal is single-ended input or differential input.
The level conversion chip in the power management module 2 of this embodiment adopts SN74LV1T126, the SN74LV1T126 is a low-voltage CMOS gate logic with a wide voltage range, and the output level of the circuit is based on the power voltage and can support 1.8V/2.5V/3.3V/5V CMOS levels, which can be used for level matching between an incremental encoder IO (5V) and an MCU IO (3.3V); the voltage stabilizer in the power management module 2 adopts a 500mA low dropout linear voltage stabilizer LT3085, so that the stable voltage output of 3.3V and 2.5V can be realized, the 3.3V voltage can be used for supplying power to a Microcontroller (MCU), a memory and an ADC analog-to-digital conversion module 4, and the 2.5V voltage can also be used for supplying power to the ADC analog-to-digital conversion module 4.
The interface module 6 of this embodiment includes DC interface, ADC interface, USB interface, SPI interface, SWD interface and motor drive board interface, and the DC interface is used for connecting outside 5V power, and the USBs interface is used for communicating with the host computer, accepts host computer command and feedback data and gives the host computer.
The system board 1 of the present embodiment is integrated with software modules, and the software modules include a software module for receiving and sending data based on a USB bottom layer driver of an STM32F406VGT6 controller, a software module for acquiring optical power at a high speed in real time, a data transmission software module based on DMA, a software module for measuring pulse width and duty ratio of a photoelectric encoder, a slit scanning rotation speed control software module, and an upper computer demonstration software module.
The present embodiment has the following functions: signal amplification, filtering, analog-to-digital conversion and data acquisition and storage of the near-infrared detector are realized; outputting 1 path of PWM signals to realize the control of the rotating speed of the motor; outputting 1 path of enable signals to realize the rotation control of the motor; collecting motor revolution signals output by a motor driver; the circuit is provided with 1 path of USB communication interface to realize the control and data transmission of the circuit; the narrow slit scanning control circuit is provided with an SWD debugging interface for debugging the narrow slit scanning control circuit; the host computer can set the slit scanning rotating speed through the USB and inquire the current rotating speed.
It should be understood that the above is only an embodiment of the present invention, and the present invention is not limited to the above embodiments, and those skilled in the art can make various combinations and modifications of the above technical features, and those skilled in the art can make modifications, variations, and equivalent substitutions of the present invention or use the structure or method of the present invention in other fields to achieve the same effect without departing from the spirit and scope of the present invention, and all fall within the protection scope of the present invention.
Claims (9)
1. A slit scanner's control circuit, includes system board, its characterized in that: the system board is provided with a power management module, a controller module, an ADC (analog-to-digital converter) module, an incremental encoder and an interface module; the power management module is used for providing power; the controller module is connected with each module and is used for receiving or sending commands to coordinate the work of each module; the ADC module is used for converting an analog signal; the incremental encoder is used for being matched with the photoelectric coded disc to realize the encoding function; the interface module is used for connecting the main circuit board with external equipment.
2. A control circuit for a slit scanner as claimed in claim 1, wherein: the controller module comprises a controller and an expansion memory, wherein the controller adopts STM32F407VGT6, and the expansion memory adopts IS62WV51216EBLL-45 TLI.
3. A control circuit for a slit scanner as claimed in claim 2, wherein: the ADC analog-to-digital conversion module adopts AD7622 BSTZ.
4. A control circuit for a slit scanner as claimed in claim 3, wherein: the power management module comprises a level conversion chip, and the level conversion chip adopts SN74LV1T 126.
5. A control circuit for a slit scanner as claimed in claim 3, wherein: the power management module comprises a voltage stabilizer, and the voltage stabilizer adopts a 500mA low dropout linear voltage stabilizer LT3085 to realize voltage output of 3.3V and 2.5V.
6. The control circuit of a slit scanner as set forth in claim 5, wherein: the 3.3V voltage is mainly used for supplying power to the controller, the memory and the ADC module, and the 2.5V voltage is mainly used for supplying power to the ADC module.
7. The control circuit of a slit scanner as set forth in claim 6, wherein: the power management module converts externally input 5V voltage into 12V voltage and is used for providing power for a motor driving plate connected with the system board.
8. A control circuit for a slit scanner as claimed in claim 1, wherein: the interface module comprises a DC interface, an ADC interface, a USB interface, an SPI interface, an SWD interface and a motor drive board interface, and the expandability and the compatibility of the control circuit are improved through various interfaces.
9. The control circuit of a slit scanner as set forth in claim 8, wherein: software modules are integrated on the system board, and the software modules comprise a USB bottom layer drive data receiving and sending software module based on an STM32F406VGT6 controller, a software module for collecting optical power at a high speed in real time, a data transmission software module based on DMA, a software module for measuring pulse width and duty ratio of a photoelectric encoder, and a slit scanning rotating speed control software module.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020949052.4U CN211857256U (en) | 2020-05-29 | 2020-05-29 | Control circuit of slit scanner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202020949052.4U CN211857256U (en) | 2020-05-29 | 2020-05-29 | Control circuit of slit scanner |
Publications (1)
Publication Number | Publication Date |
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CN211857256U true CN211857256U (en) | 2020-11-03 |
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Family Applications (1)
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CN202020949052.4U Expired - Fee Related CN211857256U (en) | 2020-05-29 | 2020-05-29 | Control circuit of slit scanner |
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CN (1) | CN211857256U (en) |
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2020
- 2020-05-29 CN CN202020949052.4U patent/CN211857256U/en not_active Expired - Fee Related
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201103 |
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CF01 | Termination of patent right due to non-payment of annual fee |